Stoker



glwueml'oz Leonard Llose.

Feb. 14, 192s.

L. L. CLOSE STOKER Filed April 4, 1923 Patented rel. 14, 192s.

LEONARDL 'LEROY omen, or ABURN, INDIANA, AssIeNonL fro AUfBunN roUNDnxf-f oonroRA'rroN, ory AUBURN, INDIANA, A ConPonA'rIoNor yINinANA. i

' AppncauonaiaiApri14,192s. serarivo.. egeaei.l

lily said invention relateswto stokers for furnaces and it is an object of the invention Vto provide improved means for 'feeding the Vfuel oftl the coking grate tothe inaingrate. Another object ofthe invention is to .'pro

above the fuel body." l Y Still lanother `object ofv the invention iste provide means for admittingfair tothemass offjuel onthe 'coking grate 'in' a manner to cause it to pass through saidmass. l

Referring to ,the accompanying drawings which are made apart hereof 'and on [which similar reference characters indicatefsimilar parts, i

The

lvide means-for admitting air .to t-hle'jfire figure is a verticallongitudinal section of a Vpart of a furnace equipped with my fuel and air supplyingmeans in ya preferred for 1n In the 4drawings reference character 10 in-Y dicates a part of the main grate of La furnace of conventional type and 11 vtheycoking plate or grate used in connection therewith. A support 1,2 is providedavith rollers 13 which form anti-friction supporting means for a ram 14 `here shown as mounted to reciprocate in a horizontal plane. Upper guides for the ram are provided at 15. and a. perforated plate 16 is supported by the frame 12 just above the rear end of the ram, the face of the plate preferably lying in the same plane as the rear face of the ram when in its normal retracted position. The .rear end of the ram is hollow and is filled with any suitable refractory composition such as fire brick- The rearend is hollow and is provided with a transverse pivot 17 which carries one end of a link 18 pivoted Y at the other end to a bent lever 19 which is mounted to rock on a pivot 20.

At the front of they plate 16 is a. chamber for admission of air to the plate and adjacent the plate is a valve-21 swingably sup-V ported by a pivot 22 and having pivoted thereto at its lower end a rod 23 provided at the other end with a hand hold' 24. By means of this rod the draft through the ventilating plate can be adjusted. The upper wall 25 of the chamber supports 0r lies adjacent to bricks 26 forming a part of the lining of the furnace and sloping at the rear toward the plate 16. Above the bricks 26 is a hopper 27 open at its lower end and providedwith a bottom closure 28 in the form of a plate mounted for horizontal reciprocarelation thereto Vby boltsk BO. At it VSlof the furnac ,ffuelv on the eoking `fuel li.

andthe bricks'26.v Beneath the closure 26 Aa perforated ifentilating plate 29 spaced from the first named plate and hel 'tion on guides located between the hopper n 2`S'is provided i'vith a'pin traveling in a M slot of a bent lever lfl by means of which the bottom closure of fthe hopper may be reciprocatedfto admit fuel to the furnace.

Then so operated lthe fuel will run down slopin facey of the brick'work to the coki ng 'grate-11'orto the material restingon the grate.

A'Iheflever 1S) is oscilla-.ted at appropriate lintervals',to force the yrain into the mass of :ate und it will be seen" that when this is one the partially,ie'mite.r

l v gnearest to saidfgrate will be moved out "andfe'd tothe main grate;v This oommonlydone in two steps,` theV ram being' 4firstforced halfway back'and rafter a tin being moved the rest of the way. ylVhen the ram is retracted the fuel which formed the yupper part of the pile will fall down on the 1 coking grate and the processl will be rc i peated. y

By the use of my invention it will be seen that the preliminary ignition on the coking grate is carried out to a fuller extentthan inv prior constructions since all the fuel onV the coking grate will be more or` less ignited.4 The degree of the ignition atthe upper part of the mass can be regulated Vby varying the position of the valve 21.

The Vimportance Vof this condition will be evident to those skilled in the art as it permits full advantage to be taken of the oily and tarry material in the fuel which is otherwise lost in the smoke.

The Ventilating plate beneath the alsor contributes to the ydesirable condition above explained since vit has been found by .experimentV that where no air is admitted to' the ifurnace above the bed of fuel a large ,part of the gases evolved are in theform of CO and unless air is'admitted at this stage the desirable oxidation to COZis not effected.

hopper i,

While I have shown my invention as embodied in a hand. vStoker it will be obvious to those skilled in lthe art that the same may hopper arranged and constructed to feedl fuel thereto said hopper having a feed opening at the bottom, a closure for said feed opening, and means for admitting air to the furnace above the fuel bed said means beingv movable with said closure, substantially as eet forth.,

2. In a stoler furnace, a coling` grate, a hopper arranged and constructed to feed fuel thereto said hopper having` a feed opening at the bottom, a horizontally movable closure for said feed opening, a perforated plate movable with the closure and forming part of the lining` of the furnace said plat-e being' spaced from the closure and adapted to admit air to the furnace above the fuel bed, substantially as eet forth.

In a furnace, a front wall, a ram normally positioned with its inner face approximately in the plane of the inner face of said wall., a. Cokin; grate behind the ram, an air passage above the ram, a damper in said passage immediately above the rain, a hopper above said damper in front of the vertical inner face of the furnace wall, said wall havinp; an inclined face below the hopper leading toward the colringl grate, a bot4 toni closure for the hopper, and a perforated plate spaced from the under face of said closure and movable therewith whereby a downward and inward draft of air is provided below the bottom vof the hopper, substantially as set forth.

t. In a Stoker furnace, a horizontal ing grate, a vertical wall at the front side of the grate, means for piling` green fuel on said grate and against said wall, a main grate, a manually-operated rain to force the fuel at the bottom of the pile toward the main grate, and a perforated plate above the ram for forming a draft through the green fuel at the top of the pile toward the body of the furnace, substantiallyv set forth.

5. In a Stoker furnace, a horizontal coliing grate, a vertical wall at the front side of the grate, means for piling green vfuel on said gjrate and again-st said wall, a manually-operated ram to force the fuel at the bottom of thepile toward the main grate, a perforated plate above the rain for forni` ing' a draft through the Vgreen fuel at the top of the pile toward the body of the furnace, and a damper controlling said draft, substantially as set forth.

In witness whereof, I have hereunto set my hand at Auburn, Indiana this 30 day of March, A. D. nineteen hundred and twenty-three.

LEONARD LEROY CLOSE.

colt- 

